Fix request: JKA maps' brightness adjusment

[CansecoDev]

Description:

JKA maps loaded into JK2 have about 100% more brightness, this is caused by the default r_overBrightbits 0 JKA uses (also maps were designed with this setting in mind).

Images:

Manual solution:

For a player to fix this manually, it would require to put in the console r_overBrightbits 0; vid_restart; upon loading a JKA map in JK2mv, and then r_overBrightbits 1; vid_restart; upon loading back a JK2 map.**

Fix request

Since the current implementation of loading JKA assets is already aware of a map being from JKA, it would be good to have an automated way of doing just that, adjusting the overbrightbits back and forth when loading JKA/JK2 maps.

Might be a better (better than requiring a vid_restart upon loading a map) approach for this though, but this method at least makes it looks close enough to JKA brightness.

--
Thanks to mjt and Tom, otherwise I would've been wasting hours adjusting lightmaps, which was not the issue at all...